Custom collection support is now centralized in ….util.CustomCollections. It exposes API to detect whether a type is a map or collection, identifies the map base type etc.
Support for different collection implementations is externalized via the CustomCollectionRegistrar SPI that allows to define implementations via spring.factories. The current support for Vavr collections has been moved into an implementation of that, VavrCollections.
Unit tests for custom collection handling and conversion previously living in QueryExecutionConverterUnitTests have been moved into CustomCollectionsUnitTests.
Fixes#2619.
b3ec06f479